Commit 392cea5e authored by Longfang Liu's avatar Longfang Liu Committed by JangShui Yang
Browse files

vfio/migration: add eq and aeq interruption restore 

virt inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9DRAC


CVE: NA

----------------------------------------------------------------------

For the current live migration process, supplement the doorbell
command operations of EQ and AEQ

Signed-off-by: default avatarLongfang Liu <liulongfang@huawei.com>
Signed-off-by: default avatarJiangShui Yang <yangjiangshui@h-partners.com>
parent 238404f2

drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c

+17 −0
Original line number Diff line number Diff line
@@ -444,6 +444,19 @@ static int vf_qm_get_match_data(struct hisi_acc_vf_core_device *hisi_acc_vdev, 
	return 0;

}



static void vf_qm_xqc_restore(struct hisi_qm *qm,

	struct hisi_acc_vf_migration_file *migf)

{

	struct acc_vf_data *vf_data = &migf->vf_data;

	u16 eq_head, aeq_head;



	eq_head = vf_data->qm_eqc_dw[0] & 0xFFFF;

	qm_db(qm, 0, QM_DOORBELL_CMD_EQ, eq_head, 0);



	aeq_head = vf_data->qm_aeqc_dw[0] & 0xFFFF;

	qm_db(qm, 0, QM_DOORBELL_CMD_AEQ, aeq_head, 0);

}



static int vf_qm_load_data(struct hisi_acc_vf_core_device *hisi_acc_vdev,

			   struct hisi_acc_vf_migration_file *migf)

{
@@ -673,6 +686,7 @@ static int hisi_acc_vf_load_state(struct hisi_acc_vf_core_device *hisi_acc_vdev) 
{

	struct device *dev = &hisi_acc_vdev->vf_dev->dev;

	struct hisi_acc_vf_migration_file *migf = hisi_acc_vdev->resuming_migf;

	struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm;

	int ret;



	/* Recover data to VF */
@@ -682,6 +696,9 @@ static int hisi_acc_vf_load_state(struct hisi_acc_vf_core_device *hisi_acc_vdev) 
		return ret;

	}



	/* Restore eqc and aeqc interrupt information */

	vf_qm_xqc_restore(vf_qm, migf);



	return 0;

}